Making pure chlorbenzol.



;UNITED STATES PATENT oFFIoE.

LOUIS RAIBINOVITZ, or MONTCLAIR, NEW JERSEY, ASSIGNOR r0 ELLIS-FOSTER compan A conronnr'ron or NEW'JERSEY.

No Drawing.

To all whom it may concern:

Be it known that I, LOUIS RAB1Nov1az,a citizen of the'UnitedStates, and a resldent of'Moiitclair, in the county ofEssex. and State of New Jersey; haveinvented certain new and useful lmprovements in Making, Pure Chlor'benzol, of which the following 1s a specification. v

This invention relates to a method of chlorinating organic compounds, especlally benzol to make pure c'hlorbenzol and the like and comprehends the treatment of benzol preferably with air-free'chlorin preferably tributing and suspending qualities. 7 v

The catalytic material in its initial form preferably; is prepared; by reacting with ferric chlorid on finely-powdered iron such as iron reduced by alcohol or byi'hydrogen and the like; 4 An illustrative method of preparing the catalytic material isxto mix equal weightsv of iron reduced by hydrogen and ferric chlorid containing about six molecules of water of hydration. Theseare thoroughly triturated in a mortanahd at. first liquefaction takes place but on'standing arise in temperature occurs and the mass becomes converted into a' solid product; which is ground preferably to' pass a one hundred mesh screen and, is carefully dried. The reaction between the-*ferric. chlorid and the finely-divided irom produces a sub-chlorid in S0 finely divided a state that it is very susceptible to'the action of chlorin and distrilailtes itselflreadily throughout the benzol or other material which is bein chlorinated,

serving as a. very" fiicient carrier of chlorin to the material. 1 The heat-developed'in the chlorination of benzolto form' 'chlorbenzol is so great that the temperature,has to bezcarefully con conditions using t e "c'atalyzer herein that a trolledor tar and-resins; result and I find that working at a temperature between 10 and 15 0., aflords good result while the chlorin is taken 11'] so rapidly under these" scarcely anysv odor of chlorin can be deteeted coming from the reaction mixture evenv though employing small-quantities. of benzol such for example as would be the case when c'arrying out experiments in the laboratory in small vessels.

The benzol is preferably agitated during Specification of Letters Patent.

Patented July 4, 1916.

Application 'flled January 19, 1916. Serial No. 72,947.

the chlorination operation and the treatment may be carried out in tall tanks fitted with an agitator shaft and paddles and equipped with a cooling coil or jacket. The

. jected with agitation for four hours to a current of dry air-free chlorin gas while maintaining the temperature between 10 and 15. No chlorin escaped as absorption was complete. Pure h dro-chloric acid was largely of chlorbenzol.

Instead of washing, the chlorbenzol may be distilled directly and the dissolved hydrochloric acid llberated'v in part while any nation apparatus. Y J 1 r The reaction of ferric chlorid with finely- -formed. The produ' "was washed, dried and distilled and wasl fhund to consist,

'unchlorinated benzol saturated with hydro-l chloric acid, may be returned-to the chloridivided iron results inthe formation of a sub-chlorid and an excess of unchanged iron, the latter being in such intimate contact with the chlorid that the product may be' regarded as consisting to a large extent of particles of ironcoated with-the lo'wer chlorid with which it is also apparently in weak chemical combination. v What I claim is:' 3

1. A catalyzer adapted for organic bodies which" compiises' iron chlorid and finelydivided iron in intimate ontactand in the form of a very fine ppwder.

The process of chlorinatin hydroc'a'r ns which comprises agitating these with a fine powdercontaining irony nd a b-chlorid,;in the presence of dry chlorin. r

which comprises agitating it with a fine powder containing iron in the presence of dry air-free chlorin and .at a temperature aromatic 3: The process J pf chlorinating benzol powder Eontaining a catalyzer comprising during the passage of the gas and in main-* iron in the presence of chlorin while cooling taining the temperature by artlficlal cool- I 'to a temperature below 15 C.

5. The process of chlorinating benzol quantities of higher chlorinated products i which comprlses passing through a body of are formed.

i "benzol containing an iron cat'alyzer a current of chlorin gas, in agitating said body L I LOUIS RABINOVITZ.

,ing below the point at ."which substantial-110 

